APA-referens (7:e uppl.)
Von der Heydt, J. E. (2008). At the brink of infinity: Poetic humility in boundless American space. University of Iowa Press.
Chicago-referens (17:e uppl.)
Von der Heydt, James E. At the Brink of Infinity: Poetic Humility in Boundless American Space. Iowa City: University of Iowa Press, 2008.
MLA-referens (9:e uppl.)
Von der Heydt, James E. At the Brink of Infinity: Poetic Humility in Boundless American Space. University of Iowa Press, 2008.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.